Perhaps you should try some spelling variations:
"hanh tinh da snippets" » "hanh trinh da snippets", "nhanh tinh da snippets", "thanh tinh da snippets", "hanh tinh va snippets", "hanh tinh gia snippets", "hanh tinh lao snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("hanh tinh da snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hanh tinh da snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hanh tinh da snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hanh tinh da snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.